Constant Pressure on ink cartridges

You have raised a question about the principle of balance between supply and pressure.

Different shapes are provided, but the basic principles are the same.

Take red as an example:

 

For example. When the printer is still, the ink gravity in the ink chamber is equal to the negative pressure generated by air thinning above the ink chamber. Ink does not flow. Achieves a static balance of pressure.

When the printer works, the ink Chamber ink drops, the air on the ink Chamber becomes thinner, resulting in a greater negative pressure, the ink will not flow unlimitedly to the inner ink cartridge, always in the balance.

Ink continues to drop. When the air negative pressure reaches a certain level, the air enters the ink Chamber from the gas chamber connected to the ink chamber, and then rises to the ink chamber to relieve the negative air pressure, create a new pressure balance to ensure a normal supply of ink in the inner ink cartridge.

This is the most basic principle of balance between supply and pressure.

If there is too little ink in the ink chamber, and there is a lot of ink in the air chamber, the negative pressure on the ink chamber is much lower than the gravity of the ink, the pressure is not balanced, ink will continuously flow into the inner ink cartridge under its own gravity, and flow into the waste ink silo through the nozzle. This will not only cause a waste of ink for no reason. During printing, the excess ink will be flushed out. The light will pollute the photo, pollute the printer, and then burn out the nozzle or motherboard.

-- Reference Baidu's answer